#1: Alternator overcharge Author: jonnyg2k5, Posted: Tue Jan 20, 2015 3:26 am ---- I had an issue where by the alternator stopped charging the battery. I figured that I had no 12v signal to the exciter wire from the plug in the engine fuse box. Have temporarily put a switched +ve onto the exciter wire and it charges now but can over charge, up to 16v! My question is, is there a fuse for the exciter circuit? And also does the ecu turn off alternator charging from time to time under normal running to prevent over charging or is my alternator goosed as it should never charge that high? Please help!
#2: Re: Alternator overcharge Author: Steve206, Location: UKPosted: Tue Jan 20, 2015 6:08 am ---- There should be a charge regulator on the alternator. Probably easiest just to replace the alternator.
#3: Re: Alternator overcharge Author: jonnyg2k5, Posted: Thu Jan 22, 2015 8:44 am ---- Ok got replacement alternator
#4: Re: Alternator overcharge Author: jonnyg2k5, Posted: Thu Jan 22, 2015 9:16 am ---- Anyone advise on how big a job it is ? Garages saying 3.7hrs and looks a bit tight in there
#5: Re: Alternator overcharge Author: Steve206, Location: UKPosted: Thu Jan 22, 2015 1:09 pm ---- What engine?
#6: Re: Alternator overcharge Author: jonnyg2k5, Posted: Fri Jan 23, 2015 1:00 am ---- GTI138, s16.....
#7: Re: Alternator overcharge Author: Steve206, Location: UKPosted: Fri Jan 23, 2015 5:05 am ---- Not to hard. Aux belt off, might need to drop aircon pump first. Easily done on ramps though
#8: Re: Alternator overcharge Author: jonnyg2k5, Posted: Fri Jan 23, 2015 11:51 am ---- Dam alternator from eBay (genuine pug) has two bolt on posts as opposed to one post and a two pin connector. Can I still use this?
#9: Re: Alternator overcharge Author: Steve206, Location: UKPosted: Fri Jan 23, 2015 1:45 pm ---- Do the part numbers match. Should be two to bolt to the engine block. You'd have to check the connector. Is it 2nd hand?
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